Pith Number

pith:B3CTTEHA

pith:1999:B3CTTEHAWRUSLM7O45DDSKJHQJ

not attested not anchored not stored refs pending

Vacuum Energy: If Not Now, Then When?

Hamburg & University of Pennyslvania, Philadelphia), Sidney A. Bludman (Desy

arxiv:astro-ph/9907168 v1 · 1999-07-13 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B3CTTEHAWRUSLM7O45DDSKJHQJ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:40:12.909569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ec53990e0b46925b3eee74639292782544eb58d8f253b5b340cae9bb1e72ad3

Aliases

arxiv: astro-ph/9907168 · arxiv_version: astro-ph/9907168v1 · doi: 10.48550/arxiv.astro-ph/9907168 · pith_short_12: B3CTTEHAWRUS · pith_short_16: B3CTTEHAWRUSLM7O · pith_short_8: B3CTTEHA

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/B3CTTEHAWRUSLM7O45DDSKJHQJ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0ec53990e0b46925b3eee74639292782544eb58d8f253b5b340cae9bb1e72ad3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c19be1bbdea53154dea041e1a1edb7812a8802207ebfe4e4c2296cb75bdd68b5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-13T12:16:03Z",
    "title_canon_sha256": "c6660d34521bd3630afb7404b15fce75f4d27122f7ade3d1a6ce00f30e5a23a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907168",
    "kind": "arxiv",
    "version": 1
  }
}